In the town of Saima, when summer is about to begin, a group of six high school students intend to live a secret adventure by spending seven carefree days in a ruined mining facility.
as Aya Chiyono (voice)
as Mamoru Suzuhara (voice)
as Saki Akutsu (voice)
as Malet (voice)
as Kaori Yamazaki (voice)
as Hitomi Nakayama (voice)
as Masahiko Honda (voice)
as Hiroto Honjō (voice)
as Sōma Ogata (voice)
as Yamazaki - Kaori's Father (voice)
as High-level Politician (voice)
as Immigration Administrator (voice)
as Mamoru Suzuhara (voix)
as Aya Chiyono (voix)
as Kaori Yamakasi (voix)
as Souma Ogata (voix)
as Saki Akutsu (voix)
